Jacquard cylinder motion



NOV. 25, 1952 ROBERTS 2,619,127

JACQUARD CYLINDER MOTION Filed July 6, 1951 INVENTOR GEORGE CEClL ROBERTS ATTORNEY Patented Nov. 25, 1952- JACQUARD CYLINDER MOTION George Cecil Roberts, Fairfax, Ala-., assignor to West Point Manufacturing Company, Shawmut, Ala., a corporation of Alabama Application July 6, 19-51, Serial No. 235,422

4 Claims,

This invention relates to improvements in jacquard motions, and the present invention is particularly applicable to the loom known as the Jacquard loom wherein the weaving is controlled by a perforated pattern chain.

For weaving complicated and intricate designs in material such as terry cloth the Jacquard loom is commonly employed. The usual form of jacquard employs a single cylinder or a pair of cylinders mounted above and at each end of the loom. Whether a single cylinder or a pair of such cylinders is employed, their operation is the same in that the cylinder is reciprocated in a horizontal direction toward and away from a needle board with the motion imparted to the needle acting to control the warp threads, as is well known in the art, A set of pattern cards for each cylinder is employed and these are fed one at a time to the needle board by rotation of the jacquard cylinder, which is ordinarily given a quarter turn after each travel of the shuttle across the bed of the loom. This turning motion is suificient to present a new pattern card during the outward motion of the cylinder away from the needle board. In order to rotate the cylinders as they move away from the needle board a pivotally mounted lever or pawl member is customarily employed so as to engage one of the four lugs on the end of the jacquard cylinder to rotate the cylinder a quarter turn during its outward movement away from the needle board. As a result of the continuous frictional contact of the turning pawl or indexing fingers with the lu s of the cylinder, considerable wear is involved which results in costly replacement of these parts. Also, the number of pattern cards required is rather high, and the constant rotation of these patterns and their contact with the needle board materially reduces the life of the pattern cards.

The present invention contemplate reducing the number of cards required to weave a given pattern and, in addition, operate to considerably reduce the wear on the jacquard cylinder and the indexing fingers.

A further object is to reduce the expenditure for pattern cards. By reducing the number of cards required, the time ordinarily spent in cutting new cards is materially reduced.

These objects are accomplished by providing improved means associated with the pattern cylinder which functions to interrupt the advancing movement of the pattern cylinder in its timed relation with the movement of the shuttle, whereby a pattern card will be presented to the 2 needle board twice in succession, instead of new pattern card being presented to the needle board for each pick.

A further object of the invention is to provide the aforesaid means in the nature of a device caable of attachment to various types and sizes of looms without necessitating changes in construction or operation of the looms.

A still further object is to provide a mechanism which is not controlled by the pattern cards and which does not require-a special hook and harness arrangement.

An additional object is to provide a device of the nature which operates automatically throughout the weaving operation and which is of simple construction.

Further objects and advantages of the invention will be apparent from the following description when taken in connection with the accompanying drawings wherein:

Figure 1 is a detailed elevation of the upper part of a jacquard mechanism having my invention applied thereto, the cylinder being shown in contact with the needle board.

Figure 2 is a view similar to Figure l with the jacquard cylinder in its outermost position wherein the device of the present invention has operated to interrupt the rotary movement of the cylinder.

Figure 3 is a View similar to Figure 1, but sh'owing the indexing finger positioned so that the cylinder will be rotated on its next movement outwardly from the needle board.

Figure 4 is an enlarged fragmentary top plan View of a jacquard cylinder showing the device of the present invention attached thereto.'

It will be understood that the cylinder forms only a part of the jacquard mechanism which is mounted over a loom, and only such parts of the jacquard are shown as are necessary to set forth the present invention. It will be further understood that the invention may be used in connection with a double cylinder Jacouard loom, and where so employed a cylinder such as shown in Figure 1 will be mounted at each side of the loom. Therefore, the following description is applicable to single or double cylinder jacquards.

Referring to the drawings, the jacquard frame in is provided with a horizontal slide rod l I connected with a suitable linkage (not shown) so as to move the slide rod in a horizontal direction giving said rod a reciprocation for each pick of the loom when the jacquard is of the so-oalled single cylinder type.

Referring to Figures .1 to 3, it will be seen that the rod l I has rigidly mounted thereon a bearing l4 for a gudgeon NS for the four sided jacquard cylinder l8. There are four lugs 20, 2|, 22 and 23 rigid with the cylinder I8 and adapted to be engaged by a pawl or indexing finger 26 which is loosely pivoted on a pin 28 fixed in horizontally adjusted position in a slot 30 formed in a part of the jacquard frame. The pawl 26 has a hook 32 for engagement with the lugs of the cylinder and is normally held by gravity in position for engagement with the upper left lug as viewed in Figure 1.

A needle board 34 of the usual form has needles 36, two of which are indicated in Figure 2 to be responsive to the cards C which travel over cylinder I8. In the ordinary operation of the cylinder the cards are fed progressively by angular motion of the cylinder l8.

In order to reduce the number of cards required for weaving a given pattern where the same pick can be woven twice in succession the present invention contemplates mounting a number of hinged pawl members, generally indicated at 38, adjacent to the lugs on the end face of the cylinder. While the drawings show only two of such members mounted on opposite faces of the cylinders, it is possible to have these members mounted on all four faces of the jacquard cylinder.

The members 40 of pawl 38 are secured to the face of the jacquard cylinder by welding or suitable means. The arms 42 are pivoted to the members 40 at 44 so that the arms 42 are free to swing about their pivot pawls 44 as the cylinder is rotated.

In operation, with the parts as shown in Figure 1, the cylinder is in angular position against needle board 34 to force a pattern card C against the needles 36. As the rod l I is moved outwardly.

the cylinder is moved to the position shown in contact lug 23 as the cylinder is moved outwardly,

contacts instead arm 42 of the uppermost pawl 38 which pivots about the point 44 in an angular direction which would normally be taken by the cylinder. As the motion of the cylinder continues in its outward direction, arm 42 is w.

folded back against fixed member 46 to the position shown in Figure 2, and the cylinder I8 is not advanced so that the same card again contacts needle board 34 when the cylinder returns to the position of Figure 1. Thus, it will be seen that the swinging arms 42 of the hinged pawls 38 constitute lost motion connections.

As the cylinder is again moved outwardly by the rod H, arm 42 of pawl 38 remains in its folded back condition, as seen in Figure 3, and the indexing or pawl arm 26 is allowed to contact lug 23 on cylinder I8 so as to give a quarter turn to the cylinder, so that a new card is presented for contact with the needle board 34 when it returns to the position of Figure 1.

As the reciprocation and rotation of the cylinder I8 continues, the pawl 38, which is in the upper face of the cylinder, is moved 180 so as to cause the arm 42 to depend from the face of the cylinder, as seen in Figures 1 to 3. As

the ,cylinder is rotated an additional de'-- pending arm 42 pivots until it again rests on the adjacent lug in a manner so as to extend slightly above this lug. As previously pointed out, the drawings show two such pawls mounted on opposite faces of a jacquard cylinder, and it will be noted that while one pawl will be resting against a lug on the upper position of the cylinder, the other one is hanging down in a pendant position underneath the cylinder. As the cylinder is rotated, the pawls automatically place themselves in position to be engaged by the indexing finger or lever as the cylinder moves away from the needle board.

When employing the present invention in connection with a jacquard cylinder, the cylinder will be given intermittent motion so that, instead of getting four sides of the cylinder exposed to the cards for each cycle, it is possible to get six in-and-out strokes of the cylinder for each complete cycle thereof when two such pawl are used.

From the foregoing it will be seen that ac cording to the present invention a lost motion connection is provided between the cylinder andv the indexing pawl so as to reduce the number of turning motions normally imparted to the cyllinder, which thereby decreases the number of cards required for weaving a given pattern.

While a number of devices have been developed for deactivating the cylinder motion at a given point in the weaving operation to place cutting markers in the cloth, these mechanisms are somewhat complicated and are usually controlled by special holes punched in the pattern cards, which, in turn, require additional hooks and harness mechanisms to control the cylinder motion in response to the punched holes.

On the contrary, the present invention provides simple and fully automatic means for intermittently deactivating the cylinder motion which materially decreases the expenses incident to the weaving operation.

Having thus described my invention, it will be seen that changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

I claim:

1. In a cylinder motion for a Jacquard loom, a needle board, a cylinder, a member on which the cylinder is rotatably mounted to move said cylinder away from and toward the needle board, means to give the cylinder an angular motion in a given direction as the cylinder moves away from the needle board, and means on said cylinder for rendering said motion producing means inoperative at predetermined intervals, said means being automatically operative by means of the motion of the cylinder.

2. In a cylinder motion for a Jacquard loom, a needle board, a cylinder, a member on which the cylinder is rotatably mounted to move said cylinder away from and toward the needle board, means to give the cylinder angular motion in a given direction as the cylinder moves away from the needle board, a hinged pawl member mounted on a face of said cylinder, said pawl member having a free end capable of angular motion in the same direction as said cylinder motion upon contact by the cylinder turning means.

3. In a cylinder motion for a Jacquard loom, a needle board, a cylinder, a member on which the cylinder is rotatably mounted to move said cylinder away from and toward the needle board, means to give the cylinder angular motion in a given direction as the cylinder moves away from the needle board, a hinged pawl member mounted on one face of said cylinder, a second hinged pawl member mounted on the opposite face of said cylinder, said pawls having free ends capable of angular motion in the same direction as said cylinder motion upon contact by the cylinder turning means.

4. In a cylinder motion for a Jacquard loom, a needle board, a cylinder, a member on which the cylinder is rotatably mounted to move said cylinder away from and toward the needle board, a pivotally mounted lever having means on its outer end to engage lugs on said cylinder as the cylinder moves away from the needle board to advance said cylinder a quarter turn, a plurality of pawl members, each of said pawls having one end secured to a face of the cylinder adjacent one of the lugs, with the free ends of said pawls resting upon and extending slightly above the adjacent lug when the face of the cylinder is in its uppermost position, and pivot means joining the fixed ends and the free ends of said pawls, said pawls comprising lost motion connections with the cylinder rotating means.

GEORGE CECIL ROBERTS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

